Title

Outlook Object Model scripts must be disallowed to run for shared folders. (Cat II impact)

Discussion

In Outlook, folders can be associated with custom forms or folder home pages that include scripts that access the Outlook object model. These scripts can add functionality to the folders and items contained within, but dangerous scripts can pose security risks. By default, Outlook does not allow scripts included in custom forms or folder home pages for shared folders to execute. If this configuration is changed, users can inadvertently run dangerous scripts when using shared folders, which can put their computers or data at risk.

Check Content

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Outlook Options -> Other -> Advanced "Do not allow Outlook object model scripts to run for shared folders" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\15.0\outlook\security Criteria: If the value SharedFolderScript is REG_DWORD = 0, this is not a finding.

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2013 -> Outlook Options -> Other -> Advanced "Do not allow Outlook object model scripts to run for shared folders" to "Enabled".

Additional Identifiers

Rule ID: SV-53899r1_rule

Vulnerability ID: V-17676

Group Title: DTOO232 - OOM scripts for Shared Folders

Expert Comments

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